ls [remote-directory] [local-file]
                 Print a listing of the contents of a directory on the remote
                 machine.  The listing includes any system-dependent informa-
                 tion that the server chooses to include; for example, most
                 UNIX systems will produce output from the command 'ls -l'.
                 (See also nlist.)  If remote-directory is left unspecified,
                 the current working directory is used.  If interactive
                 prompting is on, ftp will prompt the user to verify that the
                 last argument is indeed the target local file for receiving
                 ls output.  If no local file is specified, or if local-file
                 is '-', the output is sent to the terminal.